The Stokes Select Squirrel proof Double feeder keeps squirrels and large birds out,holds 2 suet or small bird seed cakes. Stokes Select Suet Feeders have a double locking closure system that keeps suet secure in the feeder. Use with either Suet cakes or or small seed cakes. In early spring fill with pet fur or yarn for nesting materials for birds. In the summer months fill with orange halves.